Process for treating lameness by administration of a bisphosphonic acid derivative

Abstract

The invention relates to a process for treating lameness with an osseous, articular or osteoarticular component, comprising the administration, to a human or to an animal not suffering from arthritis or from fractures, of an effective amount of a bisphosphonic acid derivative of formula: in which: R 1 represents a hydrogen atom, a halogen atom, a hydroxyl, an amino, a mono(C 1 -C 4 )alkylamino or a di(C 1 -C 4 )alkylamino; R 2 represents a halogen atom, a linear alkyl comprising from 1 to 5 carbon atoms which is unsubstituted or substituted with a group chosen from a chlorine atom, a hydroxyl, an amino, a mono(C 1 -C 4 )alkylamino or a di(C 1 -C 4 )alkylamino; a (C 3 -C 7 ) cycloalkylamino, or R 2 represents a phenoxy, a phenyl, a thiol, a phenylthio, a chlorophenylthio, a pyridyl, a pyridyl-methyl, a 1-pyridyl-1-hydroxymethyl, an imidazolyl-methyl or a 4-thiomorpholinyl, of one of its pharmaceutically acceptable salts or of one of its hydrates.

What is claimed is:  
     
       1. Process for treating lameness that appears during osteochondrosis comprising the administration, to a human or to an animal not suffering from arthritis or from fractures, of an effective amount of a bisphosphonic acid derivative of formula:                    
       in which: 
       R 1  represents a hydrogen atom, a halogen atom, a hydroxyl, an amino, a mono(C 1 -C 4 )alkylamino or a di(C 1 -C 4 )alkylamino;  
       R 2  represents a halogen atom, a linear alkyl comprising 1 to 5 carbon atoms which is unsubstituted or substituted with a chlorine atom, a hydroxyl, an amino, a mono(C 1 -C 4 )alkylamino, or a di(C 1 -C 4 )alkylamino; a (C 3 -C 7 )cycloalkylamino,  
       or R 2  represents a phenoxy, a phenyl, a thiol, a phenylthio, a chlorophenylthio, a pyridyl, a pyridylmethyl, a 1-pyridyl-1-hydroxymethyl, an imidazolylmethyl, or a 4- thiomorpholinyl,  
       or one of its pharmaceutically acceptable salts or one of its hydrates.  
     
     
       2. Process according to  claim 1 , for treating a horse. 
     
     
       3. Process according to  claim 1 , comprising the administration of 0.001 mg/kg to 100 mg/kg of body weight of the bisphosphonic acid derivative. 
     
     
       4. Process according to  claim 1 , for treating limps in horses, comprising the intravenous administration of 0.01 mg/kg body weight/week to 1 mg/kg body weight/week of tiludronic acid or one of its pharmaceutically acceptable salts. 
     
     
       5. Process according to  claim 1 , comprising the oral or parenteral administration or the administration in the form of an implant of the bisphosphonic acid derivative. 
     
     
       6. Process according to  claim 1 , in which the bisphosphonic acid derivative is selected from the group consisting of: 
       1-hydroxyethylidenebisphosphonic acid and its sodium salts;  
       2-pyrid-2-ylethylidenebisphosphonic acid and its sodium salts;  
       dichloromethylenebisphosphonic acid and its sodium salts;  
       3-amino-1-hydroxypropylidenebisphosphonic acid and its sodium salts;  
       4-amino-1-hydroxybutylidenebisphosphonic acid and its sodium salts;  
       6-amino-1-hydroxyhexylidenebisphosphonic acid and its salts;  
       phenoxymethylenebisphosphonic acid and its salts;  
       thiomorpholinomethylenebisphosphonic acid and its salts;  
       4-chlorophenylthiomethylenebisphosphonic acid and its salts;  
       1-hydroxy-2-(3-pyridyl)ethylidenebisphosphonic acid and its salts;  
       1-hydroxy-2-(2-imidazoly)ethyl-1,1-bisphosphonic acid and its salts;  
       (cycloheptylamino)methylenebisphosphonic acid and its salts; and  
       2-hydroxyethylidene-2-(3-pyridyl)-1,1-bisphosphonic acid and its sodium salts.  
     
     
       7. Process according to  claim 1 , in which the bisphosphonic acid derivative is 4-chlorophenylthiomethylenebisphosphonic acid.